.5x^2-16x-5=0

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Solution for .5x^2-16x-5=0 equation:


Simplifying
0.5x2 + -16x + -5 = 0

Reorder the terms:
-5 + -16x + 0.5x2 = 0

Solving
-5 + -16x + 0.5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
0.5 the coefficient of the squared term: 

Divide each side by '0.5'.
-10 + -32x + x2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -32x + 10 + x2 = 0 + 10

Reorder the terms:
-10 + 10 + -32x + x2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -32x + x2 = 0 + 10
-32x + x2 = 0 + 10

Combine like terms: 0 + 10 = 10
-32x + x2 = 10

The x term is -32x.  Take half its coefficient (-16).
Square it (256) and add it to both sides.

Add '256' to each side of the equation.
-32x + 256 + x2 = 10 + 256

Reorder the terms:
256 + -32x + x2 = 10 + 256

Combine like terms: 10 + 256 = 266
256 + -32x + x2 = 266

Factor a perfect square on the left side:
(x + -16)(x + -16) = 266

Calculate the square root of the right side: 16.30950643

Break this problem into two subproblems by setting 
(x + -16) equal to 16.30950643 and -16.30950643.

Subproblem 1

x + -16 = 16.30950643 Simplifying x + -16 = 16.30950643 Reorder the terms: -16 + x = 16.30950643 Solving -16 + x = 16.30950643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + x = 16.30950643 + 16 Combine like terms: -16 + 16 = 0 0 + x = 16.30950643 + 16 x = 16.30950643 + 16 Combine like terms: 16.30950643 + 16 = 32.30950643 x = 32.30950643 Simplifying x = 32.30950643

Subproblem 2

x + -16 = -16.30950643 Simplifying x + -16 = -16.30950643 Reorder the terms: -16 + x = -16.30950643 Solving -16 + x = -16.30950643 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + x = -16.30950643 + 16 Combine like terms: -16 + 16 = 0 0 + x = -16.30950643 + 16 x = -16.30950643 + 16 Combine like terms: -16.30950643 + 16 = -0.30950643 x = -0.30950643 Simplifying x = -0.30950643

Solution

The solution to the problem is based on the solutions from the subproblems. x = {32.30950643, -0.30950643}

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